<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>需求</title>
<link media="all" rel="stylesheet" type="text/css" href="styles/03e73060321a0a848018724a6c83de7f-theme-base.css" />
<link media="all" rel="stylesheet" type="text/css" href="styles/03e73060321a0a848018724a6c83de7f-theme-medium.css" />

 </head>
 <body class="docs"><div class="navbar navbar-fixed-top">
  <div class="navbar-inner clearfix">
    <ul class="nav" style="width: 100%">
      <li style="float: left;"><a href="rrd.setup.html">« 安装/配置</a></li>
      <li style="float: right;"><a href="rrd.installation.html">安装 »</a></li>
    </ul>
  </div>
</div>
<div id="breadcrumbs" class="clearfix">
  <ul class="breadcrumbs-container">
    <li><a href="index.html">PHP Manual</a></li>
    <li><a href="rrd.setup.html">安装/配置</a></li>
    <li>需求</li>
  </ul>
</div>
<div id="layout">
  <div id="layout-content"><div id="rrd.requirements" class="section">
  <h2 class="title">需求</h2>
  <p class="para">
   You need to install librrd first to be able to use PECL/rrd. Most common option
   is using of librrd-dev package from your favourite Linux distro.
   PECL/rrd is tested with librrd 1.4.3, older or newer versions might or might not
   work for you.
  </p>
  <div class="warning"><strong class="warning">警告</strong>
   <p class="para">
    Librrd and hence extension itself aren&#039;t mostly thread safe. There are many
    global and shared states in librrd. It can be dangerous use this extension
    in multi threaded environments like Apache2 mpm worker.
    If there are many parallel requests, one request can change some global
    librrd state of other runnig requests.
   </p>
  </div>
 </div></div></div></body></html>